Electric riveting-machine.



A. C. TAYLOR.

ELECTRIC RIVETING MACHINE.

APPLICATION FILED sEPT.1.9,1916.

1 ,2@ 1,973 Patented Apr. 9, 1918.

4- $HEETS-SHEET 1- WITNESS INVENTOH $10. 6. 7 "uum A. C Taylaz ATTORNEVJ 'A. C,-. TAYLOR.

ELECTRIC RIVETING MACHINE.

APPLICATION FILED SEPT-19,1916.

1 ,26 1,973. Patented Apr. 9, 1918.

4 SHEETS-SHEET 2.

IN VEN TOR. WITNESS, flC T411107? ATTORNEYS.

A. C. TAYLOR.

ELECTRIC'RIVETING MACHINE.

APPLICATION FILED SEPT. 19, 1916.

Patented Apr. 9, 1918 4 SHEE'TS-SHEET 3- INVENTOH fl. 6 Tay 702i? BY EWW5 ATTORNEY A. C. TAYLOR.

ELECTRIC RIVETINC MACHINE.

APPLICATION mm SEPT-19.19716.

1,26 1,97 3. Patented Apr; 9, I918.

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UNITED sTA'rns rATENf-r OFFICE- ALBERTIS C. TAYLOR, OF WARREN, OHIO,ASSIGNOR '10 THE WINFIELD MANUFAC- TUBING COMPANY, OF WARREN, OHIO, ACORPORATION.

ELECTRIC RIVETING-MACHINE.

Specification of Letters Patent.

Patented Apr. 9, 1918.

Application filed September 19, 1916. Serial No. 121,027.

Warren, in' the county of Trumbull and State of Ohio, have inventedcertain new and useful Improvements in Electric Riveting-Machines, ofwhich the following is a specification.

Th1s invention is an lmprovement 1n electric riveting machines, andrelated to the machines shown in co-temporaneous applications filed byme and bearing Ser. Nos. 121,025 and 121,026, respectlvely. The presentapplication differentiates from both said applications in both themanual and the power mechanism through which the riveting is effectedand as hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a front elevation of themachine, and Fig. 2 is a vertical sectional elevation thereof. Fig. 3 isa plan view on a line corresponding toline 3-3, Fig. 2. Fig. 4 is a sideelevation of the upper portion of the machine looking in from the leftof Fig. l, and with the band wheel removed and the main shaft crosssectioned. Fig. 5 is a sectional elevation of the clutch mechanism onthe line of the power shaft, and Fig. 6 is a cross section of Fig. 5showing the relation of the trigger thereon. Figs. 7 and 8 are detailsof the dog and the bolt connected with the clutch, as hereinafterdescribed.

The construction herein, as in the said applications, employs twoelectrodes or dies at and I), though there are two lower dies 12 in thiscase instead of one and which are adapted to be used alternately orsuccessively at will and according as the upper electrode may be broughtinto line with either, as

- hereinafter fully described. The lower electrodes are stationary andthe upper one is movable vertically and laterally within limits, thevertical movement being, first, through the lever 3 and mechanismconnecting the same operatively with the said electrode a and, secondly,through or by power exerted primarily through main shaft S, also ashereinafter more particularly described.

The plan of the machine provides for 8 to an upsetting temperature, andcurrent for this purpose is supplied through suitable electricalconnections communicating with and through the said-electrodes and theusual transformer 6 having the laminated or other suitable connections 4therewith.

The heating of the said rivet by the means provided is practicallyinstantaneous, so that the current is no sooner closed thereon than thatthe initial upsetting of the rivet on the stock can proceed. This isaccomplished through lever 3, which is hung on a swinging link 5 pivotedon the head hand adapted to travel up and down with said head while theoperating end thereof is .pivotally en'- gaged with a rod or bar 6slidably mounted in two arms 7 on the main frame or body B. The said rodhas a spiral spring 8 about its lower end adapted to draw said rod downafter actuation or raising thereof by said lever to close the circuit atthe electrical contacts or contact members 0 and c, andfurther movementof said lever in the same direction serves to throw the 'clutchmechanism into action for engagement with the power shaft and tocomplete theriveting by power, as will presently be seen. 3

The electrical contact member 0 is pivoted between its ends on the mainframe and adapted to be tilted into contacting relation with member 0 bymeans of a depending arm 9 fixed onrod 6 and which has a tooth 10adapted to make a limited lifting and wiping engagement with a spur 12fixed on the part c, the distance or duration of such engagement beingsuliicient to close contact on member 0 and to depress said member moreor less againstits own spring 13. This being accomplished the engagementat l0, l2 ends through the further lift of rod 6 for further operatingeffects and spring 14 on contact member 0 instantly retracts said memberand breaks the contact. The duration of contact is timed to themomentary period required to heat the rivet to an upsetting temperature.

In this operation through lever 3 the fulcrum of said lever is on thelink 5 and action is against spring 8 on rod 6, but immediately beforethis action occurs the lever 3 has its fulcrum on said rod and serves tolower head it with the upper electrode 0 onto the rivet. The spring 8 isstronger in its resistance than the pressure required to and which headhas a forward projection or foot 21 for this purpose. The said plates 18and 20 are in the circuit with the laminated connections 4 running tothe transformer .and plate '18 is adapted to be swung laterally to bringelectrode a over either of the two lower electrodes. initial movement ordepression of lever 3 with its fulcrum in rod 6 the head h will belowered to rest electrode a. on the rivet, and then by a furtherdepression with the fulcrum transferred to link 5 the rod (3 is raisedagainst its spring and closes the elec tric circuit at c e. TheneXtstep-- continues the depression of lever 3 because by this time therivet is ready to be upset on the. stock .9 and lever 3 also does thiswork, but immediately after cutting off the current at the saidcontacts. Then as the said lever concludes its three several functionsas above enumerated it performs the fourth and last one of setting thepower mechanism into action. This'occurs instantly with the depressionof said lever as it upsets the rivet.

Power is communicated to the machine by shaft S and band wheel to freetorotate thereon, and said shaft has a slight crank 'upon which aconnecting rod 23 is mounted and which operates the, pivoted arm 25. Thesaid arm has a recess in which the coupling'rod is pivoted on a bearing26 and which is adapted to raise and lower said arm within limits.

A dog 28 is pivoted in the end of said arm and adapted to swing out intoengagement at its lower end with a projection 29 on a depressible bar orrod 30 supported in the rear of head 72, by means of a rubber or likecushion 31 bearing on the top of said head. A strap 32 is fixed acrossthe body B at its ends behind said head h and bar 30 and serves toengage and tilt the dog 28 back out of line with the projection or lug29 when the dog is raised, thus leaving head it and the bar 30 thereonfree to be raised as high as may be necessary to introduce the stock 8.Then as Said head is lowered and power is to be applied thereto the arm25 is swung down, the dog 28 is thrown forward by spring 33 into thepath of lug 29 and the head 7b is accordingly depressed to complete theriveting operation. The bar 30 has a nut threaded on its upper end toadjust it'to the right working pressure. On the return stroke the armand dog stop rela- It follows that at the tively as seen in Fig. 2 andremain in this position until power is again thrown on and the actionjust described is repeated.

Engagement with the JOWGI shaft is made by means of a clutch mec ianismthereon and which is initiated by lever 3, as above indi cated. Thus,the said lever is shown as having an adjustable set screw 35 in itsouter end adapted to engage the end of lever 40 and to rotate said leveron its pivot in body B a sufficient distance to disengage the dog 39from the wheel engaging bolt 41. The said bolt is adapted to enter arecess or hole 522 in the hub of wheel to and thus connect said wheelwith shaft S. The said lever 10 has a trigger 38 pivoted therein betweenits ends and the end of said trigger has a tooth 15 adapted to engage ina depression or hole in said dog into which it drops under pressure byspring 45 and which normally holds 86 said trigger in engagement withsaid dog, thus making the trigger an operating part of lever d0 towithdraw the dog from bolt 41.

Thesaid bolt being thus released from its retired and disengagingposition as to the 90 wheel V, it is ready to engage in the hole 42 insaid wheel when it revolves into line therewith and this makes clutchengagement with shaft S and power proceeds therefrom to head it andelectrode a as above described. But it is desirable not to have the headdepressed twice successively in any operation, and to prevent suchrepetition I provide for withdrawal of the bolt practically before theshaft has made a complete revolution by means of a cam 16 on the wheelhub which engages a beveled lug 17 on the trigger and serves to withdrawsaid trigger from the dog 39. Then as the bolt is carried around a shortdistance by wheel W the beveled shoulder 50 thereon engages the be\'eled surface 51 on the said dog and the bolt is withdrawn by thisengagement from the wheel and pressed back far enough to be againengaged by the dog and locked in retirement. It should have been notedthat bolt 41 is housed in a. collar 53 on shaft S, and that said bolthas a spring 5% by which it is pressed forward when released. Springs 55bear against the dog 39. It follows that the release of the clutchmechanism is automatic and positive, andengagement thereof with theshaft occurs automatically al-So after the initial movement by lever &0,which releases dog 39 and enables the bolt to take engaging position.

\Vhat I claim is:

1. An electric riveting machine as described having a slidable head andan electrode thereon, a. lever pivoted on said head and movabletherewith. and means operatively connected with said lever, to turn thecurrent on said electrode when the joint movement of said head and loveris arrested.

2. An electric riveting machine as demember and said head, powermechanism to operate said head having a clutch, and means in engagingrelation with said lever adapted to throw in the clutch subsequent toturning on the electric current..

4. An electric riveting machine as described comprising a slidable headand an electrode thereon, a slidable rod andelectrical contact member inactuating relations therewith and a lever pivoted on said head and tosaid slidable rod and adapted to actuate both successively.

5. An electric riveting machine as described having a slidable head andan electrode thereon, a lever pivoted on said head and a slidable springpressed rod at the end of said lever and serving as a fulcrum thereforto operate said head.

6. An electric riveting machine as described comprising a slidable headand an electrode thereon, a lever. havinglink pivot connection with saidhead between its ends,

a slidable rod engaged with the end of said lever having fixed verticalbearings and a spring on said rod constructed and arranged to resistendwise movement thereof by said lever.

7. An electric riveting machine as described having a slidable head andan electrode thereon, a lever pivoted on said head and a slidable rodengaged by said lever, in combination with means to close the current onsaid electrode comprising a pivoted contact member in working relationswith said lever.

8. An electric riveting machine as described having a slidable head andan electrode thereon, a lever pivoted on said head and a slidable rodpivotally connected with the end of said lever, in combination withmeans to close the electric circuit on 'said electrode comprising a setof contact members, one of saidmembers and a projection on said rodhaving a wiping engagement.

9. An electric riveting machine as de* scribed having an electricalcurrent closing mechanism comprising a depressible contact member and apivoted member adapted to contact therewith, a slidable rod and an armelectrode thereon and a lever to operate said head, in combination witha power shaft and a wheel free thereon and clutch mechanism for saidshaft and wheel, an electric switch to place said electrode in anelectric circuit, means connected with said lever to operate saidswitch, and means operated by the same lever to throw the clutch intoaction.

11. An electric riveting machine as described having a slidable head andan electrod thereon and a lever adapted to raise and lower said head, incombination with power mechanism and means to operatively engage thesame with said head having a member adapted to be engaged by said leverto set said mechanism in motion.

12. An electric riveting machine as described having a slidable head andan electrode thereon, a hand lever pivoted on said head, in combinationwith a power shaft and a wheel thereon and a train of clutch mechanismconnecting said shaft with said wheel comprising a pivoted leveroperatively engageable by said hand lever and adapted to set said trainof clutch mechanism in motion.

18. An electric riveting machine as described having a slidable head andan electrode thereon and power mechanism to depress said head comprisinga part having a cushioned support on said head and means to engage saidpart and depress the same and thereby depress said head and electrode.

14. An electric riveting machine as described having a slidable head andan electrode thereon, in combination with a part mounted on said head, adog adapted to engagesaid part and depress the said head through thesame, an arm on which said dog is pivoted and power connections toactuate the said arm.

15. An electric riveting machine as described having a sliding head andan electrode thereon, a bar in the rear of said head having a cushionsupport on the head and provided with 'a projection at its bottom, andpower actuated mechanism having a member adapted to engage saidprojection and thereby depress said head and electrode.

16. An electric riveting machine as described having a pair of fixedlower'electrodes and a single upper electrode, a slidable head and meansthereon adapted to bring said upper electrode into working relationswith either of-said lower electrodes.

17. In an electric riveting machine, a set of electrodes, a slidablehead carrying one of said electrodes, a hand lever having a yieldingfulcrum and connected to said head, a power shaft, a device in strikingrelation with said head, clutch mechanism to impart power to said devicefrom said shaft,

an o )eratin'g' connection for said clutch mechanism and an electricswitch to control the passage of current through side electrodes havingoperating connection With said hand lever.

18.1n an electric riveting machine, a counterbalanced head having anelectrode affixed thereto, and a cushioned bar slidably carried thereby,a pivoted member in striking relation with said bar, power means tooperate said member, a lever having a cushioned fulcrum and connected tosaid head, and clutch control mechanism for said power means havingoperating connection with said lover, in combination with an elec- 15trio switch to control the passage of the current through said electrodehaving operating connection with said lever.

In testimony whereof I aflix my signature in presence of two witnesses.

ALBERTIS C. TAYLOR. \Vitnesses:

A. E. VVONDUS, J. H. EWALT.

